Lock.



. Patented Sept. 25, I906.- E. n. PICKARD.

No. 658,7l5.

LOCK.

(Application sfiled May 23, 1900.)

2 Sheets-Sheet I.

(No Model.)

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UNITED STATES PATENT OFFICE.

EDWARD R. PICKARD, or NEWBURYPOR'I, MASSACHUSETTS, ASSIGNOR OF TWO-THIRDS TO ISAAC PooE,-JE.,- OF SAME PLACE, AND E. PERLEY FOWLE, OF TAPLEYVILLE, MASSACHUSETTS.

LOCK.

SPECIFICATION forming part of Letters Patent No. 658,715, dated September 25, 1900.

Application filed May 23, 1900. Serial No.1'h663. (N model.)

T all w b i may OOH/667%: In-the preferred form of my invention the Be it known that I, EDWARD R. PIOKARD, a body portions and 6 of bolts 3 and 4, respec- Citizen of the United States, residing at Newtively, are of reduced thickness, as shown buryport, in the county of Essex and State in Figs. 5 and 6, so that portion 5 may project 5 of Massachusetts, have invented certain new over and slide upon portion 6, the combined and useful Improvements in Locks; and I do thickness of these parts being no greater than hereby declare the followingto be afull, clear, that of the head of the bolt. A spring 8, and exact description of the invention, such bearing upon the pins 9 and 10, engages the as will enable others skilled in the art to which projection 11 on the top of bolt 4, falling beto it appertains to make and use the same. hind said projection when the bolt is thrown The present invention relates to looks, and in order to prevent the latter from being remore particularly to door-locks havingtwotracted by any means other than the key.

bolts and two keys. Another spring 12, bearing upon the pins 13 The object of the present invention is to andl4, engages the projection 15 on bolts 3,

[5 provide a lock of the above class so conperforming the same office for said bolt. structed and arranged that one key will ac- In order to protect more completely bolt 3,

tuate both bolts, while the other key will ac- I have provided what I call a protectortuate but one. plate 7, secured to the spring 16 and resting To the above end the present invention conupon the top and side of portion 5 of bolt 3.

2o sists in the combinations hereinafter de- A shoulder 19 on said plate is arranged to enscribed and claimed. gage the shoulder 20.on bolt 3 when the lat- In the drawings illustrating the preferred ter has been thrown, the spring 16, bearing form of my invention, Figure 1 shows myimupon the pins 17 and 18, maintaining these proved lock in side elevation, the cover-plate parts in engagement until the plate 7 shall 25 having been removed, both bolts being rehave been lifted by the rotation of the proper tracted or unlocked. Fig. 2 shows the same A key in the keyhole. Notches 21 and 22 are with both bolts thrown or locked. Fig. 3 formed in the under side of bolts 3 and 4, reshows the lower bolt locked and upper bolt spectively, to receive the key-wards, and by unlocked. Fig. 4shows the upper bolt lockedmeans of the same the bolts are thrown and 30 and lower bolt unlocked. Fig. 5isasectional retracted. The keys 23 and 24, as shown in view on lines z, Fig 1. Fig. 6 is another See- Fig. 7, are so formed that the key 23 will tional view on. line a: m, Fig. 1; and Fig. 7 throw or retract both bolts simultaneously. shows the two keys used to actuate my im- Key 24 will actuate bolt4only, irrespective of proved lock. the position of bolt 3.

5 In the usual form of door-locksuch, for The operation of my improved lock is as example, as is used on the outside door of follows: If key 23 is inserted in the lock dwelling-houses-the latch and bolt are operand turned, the parts being in the position ated by their respective keys in their respecshown in Fig. 1, both bolts will be thrown,

tive keyholes. In my improved lock, howthe shoulder on plate 7 falling behind the 40 over, there are two bolts and two keys, but shoulder on bolt 3. Should key 24 be used only one keyhole, the arrangement being such instead of key 23, bolt 4 alone will be thrown, that one key will operate both bolts simulas shown in Fig. 3, and if it should now be taneously,whilethe otherkey willoperate but desired to lock both bolts bolt 4 must first one. be unlocked by key 24, when both may be 5 In the illustrated embodiment of my inventhrown by key 23. Both bolts may be re- 5 tion 1 represents a lock-casing within which tracted by key 23, the plate 7 first being liftare slidingly mounted the latch 2 and the ed to disengage shoulders 19 and 20 on plate bolts 3 and 4. The latch 2 may be operated 7 and bolt 3, respectively. Should key 24 be in the usual manner, as shown, and constiused when both bolts are thrown, only bolt4 5o tutes no part of my invention. will be retracted, and this must again be locked by the same key before bolt 3 can be unlocked by key 23.

I am aware that locks have been constructed having two bolts and one key, a peculiar manipulation of the latter being necessary to cause it to open the look. I am also aware that it is old in the art to provide alock having a single bolt and two keys, both of which must be used to unlock the same; but, so far as I know, I am the first to provide a lock having two bolts and two keys, one of which shall actuate both bolts, while the other shall actuate but one.

Having thus described my invention, I claim as new and desire to secure by Letters Patent of the United States 1. A look, having, in combination, two bolts and two keys, one key actuating only one bolt and the other key actuating both bolts in both directions, substantially as described.

2. A lock, provided with a single keyhole, having, in combination, two bolts and two keys, one key actuating only one bolt and the other key actuating both bolts in both directions, substantially as described.

3. A look, provided with one keyhole, having, in combination, two bolts, the key-engaging portions of which lie side by side, and two keys, the one key constructed to engage and actuate one bolt and not to engage or actuate the other bolt, and the other key constructed to engage and actuate in both directions both bolts sim ultaneously, substantially as described.

4. A look, provided with one keyhole, having, in combination, two bolts, arranged one above the other and with their key-engaging portions overlapping each other, and two keys constructed, respectively, the one to engage and actuate one bolt, and the other to engage and actuate both bolts in both directions, substantially as described.

5. A look, provided with one keyhole, having, in combination, a plurality of bolts arranged one above the other, the key-engaging portions of which'lie adjacent to each other, a key constructed to engage and actuate one bolt and another key constructed to engage and actuate all the bolts in both directions, substantially as described.

6. A look, provided with one keyhole, having, in combination, a plurality of bolts arranged one above the other, the key-engaging portions of which lie adjacent to each other, one of said bolts being provided with a shoulder, a spring-pressed protector constructed to engage the shoulder and hold the bolt in its locked position, and a plurality of keys, one of which is constructed to engage and operate all the bolts in both directions, and to lift the protector, substantially as described.

7. A look having, in combination, two bolts and two keys, one key actuating only one bolt and the other key actuating in both directions both bolts simultaneously, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

EDWARD R. PICKARD.

Witnesses:

R. JAooBY, J. W. GREENOUGH, Jr. 

